European Association Of Neuro-Oncology Research Articles

Managing vestibular schwannomas with radiosurgery and radiotherapy: AGREE II appraisal of clinical practice guidelines.

Vestibular schwannomas (VSs) are rare, benign intracranial tumours that have prompted clinical practice guideline (CPG) creation given their complex management. Our aim was to utilize the Appraisal of Guidelines for Research and Evaluation (AGREE II) instrument to assess if such CPGs on the management of VSs with radiosurgery and radiotherapy are of acceptable quality. Relevant CPGs were identified following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocols. Experienced reviewers then extracted general CPG properties and rated their quality via the AGREE II instrument. Intraclass correlation coefficients (ICCs) were quantified to assess interrater reliability. Nine CPGs on the management of VSs with radiosurgery and radiotherapy were identified. All CPGs were created in the past six years and developed recommendations based on literature review and expert consensus. One guideline was deemed as high quality with seven others being moderate and one being low in quality. The clarity of the presentation domain had the highest mean scaled domain score of 96.0%. The domains of stakeholder involvement and applicability had the lowest means of 49.2% and 47.2%, respectively. ICCs were either good or excellent across all domains. Current CPGs on the management of VSs with radiosurgery and radiotherapy are of acceptable quality but would greatly benefit from improvements in applicability, stakeholder involvement, editorial independence and rigour of development. We recommend CPG authors reference the European Association of Neuro-Oncology (EANO) guideline as a developmental framework with the Congress of Neurological Surgeons/American Association of Neurological Surgeons (CNS/AANS) CPG being a valid alternative.

Challenges, limitations, and pitfalls of PET and advanced MRI in patients with brain tumors: A report of the PET/RANO group.

Brain tumor diagnostics have significantly evolved with the use of positron emission tomography (PET) and advanced magnetic resonance imaging (MRI) techniques. In addition to anatomical MRI, these modalities may provide valuable information for several clinical applications such as differential diagnosis, delineation of tumor extent, prognostication, differentiation between tumor relapse and treatment-related changes, and the evaluation of response to anticancer therapy. In particular, joint recommendations of the Response Assessment in Neuro-Oncology (RANO) Group, the European Association of Neuro-oncology, and major European and American Nuclear Medicine societies highlighted that the additional clinical value of radiolabeled amino acids compared to anatomical MRI alone is outstanding and that its widespread clinical use should be supported. For advanced MRI and its steadily increasing use in clinical practice, the Standardization Subcommittee of the Jumpstarting Brain Tumor Drug Development Coalition provided more recently an updated acquisition protocol for the widely used dynamic susceptibility contrast perfusion MRI. Besides amino acid PET and perfusion MRI, other PET tracers and advanced MRI techniques (e.g. MR spectroscopy) are of considerable clinical interest and are increasingly integrated into everyday clinical practice. Nevertheless, these modalities have shortcomings which should be considered in clinical routine. This comprehensive review provides an overview of potential challenges, limitations, and pitfalls associated with PET imaging and advanced MRI techniques in patients with gliomas or brain metastases. Despite these issues, PET imaging and advanced MRI techniques continue to play an indispensable role in brain tumor management. Acknowledging and mitigating these challenges through interdisciplinary collaboration, standardized protocols, and continuous innovation will further enhance the utility of these modalities in guiding optimal patient care.

Celebrating the 30th Anniversary of the European Association of Neuro-Oncology (EANO).

Celebrating the 30th Anniversary of the European Association of Neuro-Oncology (EANO).

AllergoOncology: Biomarkers and refined classification for research in the allergy and glioma nexus-A joint EAACI-EANO position paper.

Epidemiological studies have explored the relationship between allergic diseases and cancer risk or prognosis in AllergoOncology. Some studies suggest an inverse association, but uncertainties remain, including in IgE-mediated diseases and glioma. Allergic disease stems from a Th2-biased immune response to allergens in predisposed atopic individuals. Allergic disorders vary in phenotype, genotype and endotype, affecting their pathophysiology. Beyond clinical manifestation and commonly used clinical markers, there is ongoing research to identify novel biomarkers for allergy diagnosis, monitoring, severity assessment and treatment. Gliomas, the most common and diverse brain tumours, have in parallel undergone changes in classification over time, with specific molecular biomarkers defining glioma subtypes. Gliomas exhibit a complex tumour-immune interphase and distinct immune microenvironment features. Immunotherapy and targeted therapy hold promise for primary brain tumour treatment, but require more specific and effective approaches. Animal studies indicate allergic airway inflammation may delay glioma progression. This collaborative European Academy of Allergy and Clinical Immunology (EAACI) and European Association of Neuro-Oncology (EANO) Position Paper summarizes recent advances and emerging biomarkers for refined allergy and adult-type diffuse glioma classification to inform future epidemiological and clinical studies. Future research is needed to enhance our understanding of immune-glioma interactions to ultimately improve patient prognosis and survival.

A Clinical Audit: Assessing the Diagnostic Delay of Primary Brain Tumors, Glioblastoma IDH-Wild Type and Primary CNS Lymphoma; Exploring the Use of CSF Liquid Biopsy

Background: Diagnostic delay is a critical issue in healthcare, often leading to delayed treatment and poor patient outcomes. Diagnostic errors contribute to about 10% of patient deaths annually. Delays are very prevalent in Glioblastoma and Primary CNS Lymphoma. Both have an aggressive nature and a short survival rate, which urges for early diagnosis to ensue treatment as quick as possible. The delayed diagnosis can be attributed to tumor-specific factors such as challenging differential diagnoses, inadequate methods in achieving optimal outcomes, and the presence of confounding factors like steroid usage. Aims and Objectives: The objective of this clinical audit is to analyse patient records within an oncology unit. The primary goal is to assess the quality of practice by evaluating the standards of diagnosis and treatment. Additionally, the audit aims to pinpoint areas that require improvement at every stage of patient management, encompassing administration, symptom evaluation, and post-therapeutic measures. Based on these findings, a comprehensive plan of action will be proposed to address the identified issues effectively. Standards and Methods: In this Clinical Audit, we assessed the adherence of 10 Glioblastoma and PCNSL patients in a neuro oncology unit, to standards and guidelines set by professional medical associations. Which include World Health Organisation (WHO), National Health Service England (NHS), and European Association of Neuro-oncology (EANO). Results: Our cohort showed long diagnostic delays, minimum and maximum values of 30 and 1825 days. The sample did not show significantly longer delays compared to other PCNSL or HGG patients, all collected from the literature, with p values of 0.174 and 0.637, respectively. Conclusions: In Conclusion, Diagnostic Delay attributed to PCNSL and Glioblastoma can be pinpointed to the inadequacy of existing standards in relying solely on stereotactic biopsies for definite diagnosis when it may not be ideal for all patients at all tumor stages. A plan of action encouraging large clinical trials of CSF Liquid Biopsy is recommended with an employment of recent advances and focusing on detecting circular tumor DNA for the diagnostic insight it provides. As well as exploring its use during or post therapy to monitor the lesion and pathology. To also adhere strictly to the discouragement of steroid use for the negative prognostic factors it causes.

Gender balance and suitable positive actions to promote gender equality among healthcare professionals in neuro-oncology: The EANO positive action initiative.

The proportion of women among healthcare and biomedical research professionals in neuro-oncology is growing. With changes in cultural expectations and work-life balance considerations, more men aspire to nonfull-time jobs, yet, leadership positions remain dominated by men. The European Association of Neuro-Oncology (EANO) disparity committee carried out a digital survey to explore gender balance and actions suitable to promote gender equality. The survey was distributed among EANO members in 2021, with responses analyzed descriptively. In total, 262 participants completed the survey (141 women, 53.8%; median age 43). Respondents were neurosurgeons (68, 26.0%); neurologists (67, 25.6%), medical oncologists (43, 16.4%), or other healthcare or research professionals; 208 participants (79.4%) worked full-time. Positive action to enforce the role of women in neuro-oncology was deemed necessary by 180 participants (68.7%), but only 28 participants (10.7%) agreed that women only should be promoted until gender balance is reached. A majority of respondents (162, 61.8%) felt that women with an equivalent CV should be prioritized over men to reach gender balance. If in the future the balance favored women at higher positions, 112 respondents (42.7%) agreed to apply positive action for men. The top indicators considered relevant to measure gender balance were: salary for similar positions (183/228, 80.3%), paid overtime (176/228, 77.2%), number of permanent positions (164/228, 71.9%), protected time for research (161/227, 70.9%), and training opportunities (157/227, 69.2%). Specific indicators may help to measure and promote gender balance and should be considered for implementation among healthcare professionals in neuro-oncology.

Deep learning-based detection and quantification of brain metastases on black-blood imaging can provide treatment suggestions: a clinical cohort study

ObjectivesWe aimed to evaluate whether deep learning–based detection and quantification of brain metastasis (BM) may suggest treatment options for patients with BMs.MethodsThe deep learning system (DLS) for detection and quantification of BM was developed in 193 patients and applied to 112 patients that were newly detected on black-blood contrast-enhanced T1-weighted imaging. Patients were assigned to one of 3 treatment suggestion groups according to the European Association of Neuro-Oncology (EANO)-European Society for Medical Oncology (ESMO) recommendations using number and volume of the BMs detected by the DLS: short-term imaging follow-up without treatment (group A), surgery or stereotactic radiosurgery (limited BM, group B), or whole-brain radiotherapy or systemic chemotherapy (extensive BM, group C). The concordance between the DLS-based groups and clinical decisions was analyzed with or without consideration of targeted agents. The performance of distinguishing high-risk (B + C) was calculated.ResultsAmong 112 patients (mean age 64.3 years, 63 men), group C had the largest number and volume of BM, followed by group B (4.4 and 851.6 mm3) and A (1.5 and 15.5 mm3). The DLS-based groups were concordant with the actual clinical decisions, with an accuracy of 76.8% (86 of 112). Modified accuracy considering targeted agents was 81.3% (91 of 112). The DLS showed 95% (82/86) sensitivity and 81% (21/26) specificity for distinguishing the high risk.ConclusionDLS-based detection and quantification of BM have the potential to be helpful in the determination of treatment options for both low- and high-risk groups of limited and extensive BMs.Clinical relevance statementFor patients with newly diagnosed brain metastasis, deep learning–based detection and quantification may be used in clinical settings where prompt and accurate treatment decisions are required, which can lead to better patient outcomes.Key Points• Deep learning–based brain metastasis detection and quantification showed excellent agreement with ground-truth classifications.• By setting an algorithm to suggest treatment based on the number and volume of brain metastases detected by the deep learning system, the concordance was 81.3%.• When dividing patients into low- and high-risk groups, the sensitivity for detecting the latter was 95%.

Diagnosis and management of complications from the treatment of primary central nervous system tumors in adults.

Central nervous system (CNS) tumor patients commonly undergo multimodality treatment in the course of their disease. Adverse effects and complications from these interventions have not been systematically studied, but pose significant challenges in clinical practice and impact function and quality of life, especially in the management of long-term brain tumor survivors. Here, the European Association of Neuro-Oncology (EANO) has developed recommendations to prevent, diagnose, and manage adverse effects and complications in the adult primary brain CNS tumor (except lymphomas) patient population with a specific focus on surgery, radiotherapy, and pharmacotherapy. Specifically, we also provide recommendations for dose adaptations, interruptions, and reexposure for pharmacotherapy that may serve as a reference for the management of standard of care in clinical trials. We also summarize which interventions are unnecessary, inactive or contraindicated. This consensus paper should serve as a reference for the conduct of standard therapy within and outside of clinical trials.

Patient and carer involvement in the formulation of research questions: findings from the Italian guideline on palliative care in adults with glioma.

In 2017, the European Association for Neuro-Oncology (EANO) published the guideline for palliative care (PC) in adults with glioma. The Italian Society of Neurology (SIN), the Italian Association for Neuro-Oncology (AINO), and the Italian Society for Palliative Care (SICP) joined forces to update and adapt this guideline to the Italian context and aimed to involve patients and carers in the formulation of the clinical questions. During semi-structured interviews with glioma patients and focus group meetings (FGMs) with family carers of deceased patients, participants rated the importance of a set of pre-specified intervention topics, shared their experience, and suggested additional topics. Interviews and FGMs were audio-recorded, transcribed, coded, and analyzed (framework and content analysis). We held 20 interviews and five FGMs (28 carers). Both parties considered the pre-specified topics as important, chiefly information/communication, psychological support, symptoms management, and rehabilitation. Patients aired the impact of focal neurological and cognitive deficits. Carers reported difficulties in dealing with patient's behavior and personality changes and appreciated the preservation of patient's functioning via rehabilitation. Both affirmed the importance of a dedicated healthcare path and patient's involvement in the decision-making process. Carers expressed the need to be educated and supported in their caregiving role. Interviews and FGMs were well informative and emotionally challenging. Both parties confirmed the importance of the pre-specified topics, and carers suggested one additional topic: education/support to caregivers. Our findings strengthen the importance of a comprehensive care approach and of addressing the needs of both patients and their family carers.

Health professional involvement in the formulation of research questions: findings from the Italian guideline on palliative care in adults with glioma.

In 2017, the European Association of Neuro-Oncology (EANO)published the guideline for palliative care in adults with glioma. The Italian Society of Neurology (SIN), the Italian Society for Palliative Care (SICP), and the Italian Association for Neuro-Oncology (AINO) joined forces to update the guideline, and adapt it to the Italian context. We involved patients, caregivers, and (herein presented) healthcare professionals (HPs) in the formulation of the guideline clinical questions. Online survey of Italian HPs experienced in the care of patients with glioma. Participants rated the importance of 14 pre-specified intervention topics on a 0/10 scale and gave their free comments. Of 244 participants, 149 (61%) were palliative medicine (PM) HPs and 95 Neuro HPs. Their mean age was 48.9years, 63% were women, and 48% had over 12years of experience in the care of glioma patients. Physicians were 68%, followed by nurses (28%), psychologists (7%), therapists (3%), and social workers (2%). Most HPs rated the pre-specified topics as important (score ≥ 7) or critical (score ≥ 9), with some differences between PM and Neuro HP groups. There were 58 free comments: 46 (78%) on nine pre-specified topics, and 13 on four new topics, three of which were guideline-pertinent ("caregiver's support and education"; "family physician's training in neuro-oncology"; and "PM HPs' training in neuro-oncology"). Participation in the survey was high and information-rich, between-group rating differences reflecting HP background. Participants endorsed the 14 intervention topics devised by the guideline panel and identified three additional topics.

Basic principles of contemporary chemotherapy of malignant gliomas of the brain

The modern view on the place of antiblastic chemotherapy in clinical neuro-oncology based on NCCN 2021 clinical guidelines (The National Comprehensive Cancer Network), EANO recommendations (The European Association for Neuro-Oncology), cIMPACT-NOW (The Consortium for Inform Molecular and Practical Approaches to CNS Tumor Taxonomy) and many years of experience of the department of adjuvant treatment for the central nervous system tumors of the State Institution "Romodanov Neurosurgery Institute, Ukraine" is presented and the basic principles of its application in the complex treatment of malignant gliomas of the brain are substantiated. Malignant gliomas are a heterogeneous group of the most numerous primary tumors of the central nervous system, differing in both the grade of malignancy and the prognosis of the disease. The latest WHO tumors classification 2021 defines this group of tumors as "diffuse gliomas" of the brain, that is, the term itself indicates infiltrative nature of their growth, that limits the possibility of surgical removal and requires a multimodal approach to their treatment in order to maximize the reduction of tumor tissue. The new era of chemotherapy in neuro-oncology, as well as in general oncology, began with the study of the molecular profile of tumors, which is important both for predicting the course of the disease and for choosing tactics of chemotherapeutic treatment of malignant gliomas. It’s enough to give the following example: in the absence of IDH gene mutation and co-deletion of chromosome 1p/19q loci in grade 2 of anaplasia diffuse gliomas, the prognosis of the disease does not differ from that in glioblastoma multiforme. For the same reason, in modern neuro-oncology, the designation of molecular genetic markers in malignant gliomas is essential for the personification of the treatment of pathology is essential to personalize the treatment of this pathology.

European Association of Neuro-Oncology (EANO) guidelines for treatment of primary central nervous system lymphoma (PCNSL).

The management of primary central nervous system (PCNSL) is one of the most controversial topics in neuro-oncology because of the complexity of the disease and the limited number of controlled studies available. In 2021, given recent advances and the publication of practice-changing randomized trials, the European Association of Neuro-Oncology (EANO) created a multidisciplinary task force to update the previously published evidence-based guidelines for immunocompetent adult patients with PCNSL and added a section on immunosuppressed patients. The guideline provides consensus considerations and recommendations for the treatment of PCNSL, including intraocular manifestations and specific management of the elderly. The main changes from the previous guideline include strengthened evidence for the consolidation with ASCT in first-line treatment, prospectively assessed chemotherapy combinations for both young and elderly patients, clarification of the role of rituximab even though the data remain inconclusive, of the role of new agents, and the incorporation of immunosuppressed patients and primary ocular lymphoma. The guideline should aid the clinicians in everyday practice and decision making and serve as a basis for future research in the field.

Simple approach for the histomolecular diagnosis of central nervous system gliomas based on 2021 World Health Organization Classification

The classification of central nervous system (CNS) glioma went through a sequence of developments, between 2006 and 2021, started with only histological approach then has been aided with a major emphasis on molecular signatures in the 4th and 5th editions of the World Health Organization (WHO). The recent reformation in the 5th edition of the WHO classification has focused more on the molecularly defined entities with better characterized natural histories as well as new tumor types and subtypes in the adult and pediatric populations. These new subclassified entities have been incorporated in the 5th edition after the continuous exploration of new genomic, epigenomic and transcriptomic discovery. Indeed, the current guidelines of 2021 WHO classification of CNS tumors and European Association of Neuro-Oncology (EANO) exploited the molecular signatures in the diagnostic approach of CNS gliomas. Our current review presents a practical diagnostic approach for diffuse CNS gliomas and circumscribed astrocytomas using histomolecular criteria adopted by the recent WHO classification. We also describe the treatment strategies for these tumors based on EANO guidelines.

Whole brain radiotherapy combined with intrathecal liposomal cytarabine for leptomeningeal metastasis\u2014a\xa0safety analysis and validation of the EANO-ESMO classification

BackgroundAlthough there is no proven standard therapy for leptomeningeal metastases (LM), treatment often includes intrathecal chemotherapy combined with whole brain radiation therapy (WBRT). Little is known about the toxicity of such combination therapies. We performed a retrospective safety analysis for the combination of intrathecal liposomal cytarabine with WBRT in patients with LM and validated the EANO-ESMO (European Association of Neuro-oncology—European Society for Medical Oncology) classification in this unique cohort.MethodsTreatment toxicities in patients diagnosed with LM between 2004 and 2014 were retrospectively analyzed according to RTOG (Radiation Therapy Oncology Group) toxicity criteria and NCI CTCAE V5.0 (National Cancer Institute Common Terminology Criteria for Adverse Events, Version 5.0). Diagnostic criteria and treatment response as assessed by EANO-ESMO classification were correlated with survival by Kaplan–Meier analysis and Breslow test.ResultsIn all, 40 patients with LM who were treated with combined WBRT and intrathecal cytarabine, were identified. Ten patients (25%) experienced adverse events ≥grade 3 according to RTOG toxicity criteria; in 22 patients (55%) NCI CTCAE ≥grade 3 were detected. Median overall survival was 124 days. Median time to neurological progression was 52 days. Patients with positive cerebrospinal fluid (CSF) cytology (n = 26) showed worse prognosis compared to patients with negative CSF cytology (n = 14; mOS (median overall survival) 84 days versus 198 days, p = 0.006, respectively). The EANO-ESMO response assessment was significantly associated with survival: “stable” (n = 7) mOS 233 days, “response” (n = 10) mOS 206 days, “progression” (n = 17) mOS 45 days, “suspicion of progression” (n = 6) mOS 133 days; overall, p < 0.001.ConclusionsIn this retrospective analysis, combined treatment of WBRT and intrathecal liposomal cytarabine shows an acceptable safety profile and may indicate a trend towards improved efficacy. The EANO-ESMO classification for diagnosis and treatment response predicts survival.

OTHR-01. SNO 2020 DIVERSITY SURVEY: DEFINING DEMOGRAPHICS, RACIAL BIASES, CAREER SUCCESS METRICS AND A PATH FORWARD FOR THE FIELD OF NEURO-ONCOLOGY

Abstract BACKGROUND Neuro-oncology has grown tremendously since 2010, marked by increasing society membership, specialized clinical expertise, and new journals. Yet, modest improvement in racial/ethnic diversity amongst clinical trial participants, researchers and clinicians led us to conduct a survey identifying opportunities to enhance diversity and inclusiveness amongst neuro-oncology professionals. METHODS Summer 2020, the Women and Diversity Committee of the Society for Neuro-Oncology (SNO) distributed an anonymous online survey to members and affiliates (European Association of Neuro-Oncology, Asian Society for Neuro-Oncology, Society for Neuro-Oncology Latin America and Society for Neuro-Oncology Sub-Saharan Africa). The survey captured personal and professional characteristics, biases, effective mentorship qualities, career success metrics, and suggested field/society changes. Results were analyzed by geography, profession, age, racial/ethnic and sexual identity. Standard descriptive statistics characterized the study population. RESULTS The 386 respondents were predominantly female (58%) with a median age range of 40-49 years (31%), White (65%), and SNO members (97%). Most worked in North America (77%) in a research profession (67%). A majority of White respondents reported never experiencing biases (64%), while the majority of non-White respondents reported unconscious biases/microaggressions, followed by a lack of/limited mentorship. Qualitative assessments showcased that personal/professional success metrics were linked to needed improvements in diversity and inclusion efforts within the neuro-oncology community. CONCLUSIONS: The prevalence of racial/ethnic biases and poor mentorship rates amongst underrepresented groups in neuro-oncology is high and potentially linked to the limited diverse representation amongst members and affiliates. These findings warrant a swift implementation of equity and inclusion practices within the neuro-oncology field.

Prescription preferences of antiepileptic drugs in brain tumor patients: An international survey among EANO members.

BackgroundThis study aimed at investigating antiepileptic drug (AED) prescription preferences in patients with brain tumor-related epilepsy (BTRE) among the European neuro-oncology community, the considerations that play a role when initiating AED treatment, the organization of care, and practices with regard to AED withdrawal.MethodsA digital survey containing 31 questions about prescription preferences of AEDs was set out among members of the European Association of Neuro-Oncology (EANO).ResultsA total of 198 respondents treating patients with BTRE participated of whom 179 completed the entire survey. Levetiracetam was the first choice in patients with BTRE for almost all respondents (90% [162/181]). Levetiracetam was considered the most effective AED in reducing seizure frequency (72% [131/181]) and having the least adverse effects (48% [87/181]). Common alternatives for levetiracetam as equivalent first choice included lacosamide (33% [59/181]), lamotrigine (22% [40/181]), and valproic acid (21% [38/181]). Most crucial factors to choose a specific AED were potential adverse effects (82% [148/181]) and interactions with antitumor treatments (76% [137/181]). In the majority of patients, neuro-oncologists were involved in the treatment of seizures (73% [132/181])). Other relevant findings were that a minority of respondents ever prescribe AEDs in brain tumor patients without epilepsy solely as prophylaxis (29% [53/181]), but a majority routinely considers complete AED withdrawal in BTRE patients who are seizure-free after antitumor treatment (79% [141/179]).ConclusionsOur results show that among European professionals treating patients with BTRE levetiracetam is considered the first choice AED, with the presumed highest efficacy and least adverse effects.

Development of ‘Core Outcome Sets’ for meningioma in clinical studies: The COSMIC project

Abstract Aims To date, meningioma clinical trial activity has been limited, but a number of high-quality studies are underway, with more in development. There is heterogeneity in the outcomes reported in meningioma clinical trials. The COSMIC Project will develop two ‘Core Outcome Sets’ (COS) through comprehensive, transparent, consensus methodology; to ensure outcomes relevant to key stakeholders are reported within and across future meningioma clinical studies. The first will be for use in clinical effectiveness trials (COSMIC: Intervention), the second will be for use in clinical studies of incidental meningioma (COSMIC: Observation). Method Three systematic literature reviews will be performed to generate a long-list of outcomes potentially relevant to meningioma patients, healthcare professionals, researchers, and other stakeholder groups. The first systematic review will present the outcomes reported in published and ongoing meningioma clinical effectiveness trials. The second systematic review will present patient-reported outcomes (PRO) from the measurement tools utilised in meningioma PRO studies. The third systematic review will present the outcomes reported in published and ongoing clinical studies of untreated meningioma. Outcomes will be deduplicated, unique outcomes categorised according to the taxonomy presented by COMET, and the lists combined. The long-list of outcomes will be prioritised through two, 2-round, modified eDelphi surveys including meningioma patients, healthcare professionals, researchers, and other stakeholder groups. Undecided outcomes from both eDelphi surveys will be ratified at two, one-day consensus meeting, with representation from all key stakeholder groups. Results We have formed a study advisory group with international representation from key organisations. The project already has confirmed support from the International Consortium on Meningioma (ICOM), the European Association of Neuro-Oncology (EANO), the Response Assessment in Neuro-Oncology Patient-Reported Outcome group (RANO-PRO), the Society for Neuro-Oncology (SNO), British Neuro-Oncology Society (BNOS), Society of British Neurological Surgeons (SBNS), The Brain Tumour Charity (TBTC), and Brainstrust. Conclusion Standardising minimum outcome reporting in meningioma clinical effectiveness trials and meningioma clinical studies, through the development of these two COS will ensure outcomes reported are relevant to key stakeholder groups, including patients, whilst reducing research waste for a disease with increasing clinical trial activity. We seek to raise awareness of this project and invite participation from a wide range of stakeholders to ensure that the final COS reflects the opinion of the neuro-oncology community. Registration will take place via the study website www.thecosmicproject.org between June-August 2021.

P14.49 Prescription preferences of antiepileptic drugs in brain tumor patients: an international survey

Abstract BACKGROUND This study aimed at investigating antiepileptic drug (AED) prescription preferences in patients with brain tumor-related epilepsy (BTRE) among the European neuro-oncology community, the considerations that play a role when initiating AED treatment, the organization of care, and practices with regard to AED withdrawal. MATERIAL AND METHODS A digital survey containing 31 questions about prescription preferences of AEDs was set out among members of the European Association of Neuro-Oncology (EANO). RESULTS A total of 198 respondents treating patients with BTRE participated of whom 179 completed the entire survey. Levetiracetam was the first choice in patients with BTRE for almost all respondents (90% [162/181]). Levetiracetam was considered the most effective AED in reducing seizure frequency (72% [131/181]) and having the least adverse effects (48% [87/181]). Common alternatives for levetiracetam as equivalent first choice included lacosamide (33% [59/181]), lamotrigine (22% [40/181]), and valproic acid (21% [38/181]). Most crucial factors to choose a specific AED were potential adverse effects (82% [148/181]) and interactions with other antitumor treatments (76% [137/181]). In the majority of patients neuro-oncologists were involved in the treatment of seizures (73% [132/181])). Other relevant findings were that a minority of respondents ever prescribe AEDs in brain tumor patients without epilepsy solely as prophylaxis (29% [53/181]), but a majority routinely consider complete AED withdrawal in seizure free BTRE patients after antitumor treatment (79% [141/179]). CONCLUSION Our results show that among European professionals treating patients with BTRE levetiracetam is considered the first choice AED, with the presumed highest efficacy and least adverse effects.

SNO 2020 diversity survey: defining demographics, racial biases, career success metrics and a path forward for the field of neuro-oncology.

Neuro-oncology has grown tremendously since 2010, marked by increasing society membership, specialized clinical expertise, and new journals. Yet, modest improvement in racial/ethnic diversity amongst clinical trial participants, researchers, and clinicians led us to conduct a survey to identify opportunities to enhance diversity and inclusiveness amongst neuro-oncology professionals. In summer 2020, the Women and Diversity Committee of the Society for Neuro-Oncology (SNO) distributed an anonymous online survey to members and affiliates including the European Association of Neuro-Oncology (EANO), Asian Society for Neuro-Oncology (ASNO), Society for Neuro-Oncology Latin America (SNOLA) and Society for Neuro-Oncology Sub-Saharan Africa (SNOSSA). The survey captured personal and professional characteristics, biases, effective mentorship qualities, career service metrics, and suggested field/society changes. Results were analyzed by geography, profession, age, racial/ethnic, and sexual identity. Standard descriptive statistics characterized the study population. The 386 respondents were predominantly female (58%) with a median age range of 40-49 years (31%), White (65%), and SNO members (97%). Most worked in North America (77%) in a research profession (67%). A majority of White respondents reported never experiencing biases (64%), while the majority of non-White respondents reported unconscious biases/microaggressions, followed by a lack of/limited mentorship. Qualitative assessments showcased that personal/professional success metrics were linked to needed improvements in diversity and inclusion efforts within the neuro-oncology field. The prevalence of racial/ethnic biases and poor mentorship rates amongst underrepresented groups in neuro-oncology is high and potentially linked to the limited diverse representation amongst members and affiliates. These findings warrant a swift implementation of equity and inclusion practices within the neuro-oncology field.

EANO guideline on the diagnosis and management of meningiomas.

Meningiomas are the most common intracranial tumors. Yet, only few controlled clinical trials have been conducted to guide clinical decision making, resulting in variations of management approaches across countries and centers. However, recent advances in molecular genetics and clinical trial results help to refine the diagnostic and therapeutic approach to meningioma. Accordingly, the European Association of Neuro-Oncology (EANO) updated its recommendations for the diagnosis and treatment of meningiomas. A provisional diagnosis of meningioma is typically made by neuroimaging, mostly magnetic resonance imaging. Such provisional diagnoses may be made incidentally. Accordingly, a significant proportion of meningiomas, notably in patients that are asymptomatic or elderly or both, may be managed by a watch-and-scan strategy. A surgical intervention with tissue, commonly with the goal of gross total resection, is required for the definitive diagnosis according to the WHO classification. A role for molecular profiling including gene panel sequencing and genomic methylation profiling is emerging. A gross total surgical resection including the involved dura is often curative. Inoperable or recurrent tumors requiring treatment can be treated with radiosurgery, if the size or the vicinity of critical structures allows that, or with fractionated radiotherapy (RT). Treatment concepts combining surgery and radiosurgery or fractionated RT are increasingly used, although there remain controversies regard timing, type, and dosing of the various RT approaches. Radionuclide therapy targeting somatostatin receptors is an experimental approach, as are all approaches of systemic pharmacotherapy. The best albeit modest results with pharmacotherapy have been obtained with bevacizumab or multikinase inhibitors targeting vascular endothelial growth factor receptor, but no standard of care systemic treatment has been yet defined.